Chymoral and birth control?

I'm interested in this: my gyno prescribed Chymoral pills because my uterus is a bit pushed and there's a bit of swelling there. I came to her for contraceptive pills as well and she recommended the best ones to me, but didn't tell me I shouldn't take the two medications at the same time. I'm just wondering if the Chymoral pills can affect the contraceptive pills? Or if they're alright to be used at the same time?